Improved lathe for turning locomotive crank-pins



8n D. CHENEY.

LATHE .FOR TURNING LOGOMOTIVE CRANK PINS. fix

No."39,465. Patented Aug. 11, 1868.

UNITED STATES PATENT OFFICE.

SOCRATES S. CHENEY AND DANFOR-T'H. CHENEY, OF GALESBURG, ILL,

lMPROVED LATHE FOR TURNING LOCOMOTIVE CRANK-PINS.

Specification forming part of Letters Patent No. 39.465,,dated August 11, 1363.

I0 aiZZ Z07? am it may concern.-

comotive Driving-Wheels; and we do hereby; declare that the following is a full, clearfand exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which;

plied 'to the driving-wheel of a locomotive, w '02, Fig. 2, indicating the plane of section Fig. 2, a section of the same, taken in the line 0d 00', Fig. 1-.

Similar letters of reference indicate corresponding parts in the two figures.

The object of this invention is to obtain a simple and portable device so constructed andarranged that it may be readily; applied to the driving-wheels of locomotives, and in such relation with their prank-pins as to' admit of the latter being turned and made'truew ith outdetaching'the pins from the wheels or removing the wheels from the locomotive. .At

present, when the crank-pins of locomotive driving-wheels become worn out of roundby' use, they are detached from the wheels and replaced'bynew ones. By our improvement the worn pins may be readily made/true and rendered equally as servicable as new ones."

I130 enable jthose skilled in the art to fully' understand and construct our invention, we willproceedto dcscribegit.

. Arepresents a metal plate, the central -por-,

tion, a, of which is circular and of such dimensions' that it may be fitted over the ,hub' b'of the'driving-wheel B. This plate is secured in this position to the drive-wheel by means of .two olamps, G C,'wl 1ich areformed each of a -screw-rod,o, and a plate, d, the plates bearing against the spokes at the inner side of the fwheel, and the screw-rods 0 being fitted'in slots 6, made longitudinally in the ends of .the plate A, the nuts f of the rods bearing upon washers g, which are fitted on the rods 0 and bear against the plate A. By screwing v up the nutsf the plate A will be firmly secured to the driving-wheel.

D is a plate, the edges of which are titted in grooves between guides h h at the central nation a of the plate A. This plate D has twooblon g slots, 13 i, made in it, through which set-screws jj pass into the plate A. One end .of the plate D has aring, E, attached, the

"wheel, F, upon it, which gears into a pinion, vIEigure'I s a section of our nvention ap-.

end of shaft 0. On the shaft n of the wheel 11 there is secured a circular disky'f, which is concentric with the wheel F, and has three rods, 8, attached to it at right angles. These rods are connected at their opposite ends to a. ring, it, which is fitted within the ring E andallowed to turn freely within it. Between the ringt and disk 16 there is secured a square bar, u, whi ch is parallelwith the rods .9, and has a sliding head, H, fitted uponit, through which a screw, 1;, passes, said screw being parallel with the bar u, and having one end fitted in. thering t, the other end passing through the disk r and wheel F, and having a star-wheel, '0, upon it. The screw .0 is allowed to turn freely in its bearings, and the star-wheel c at each revolution of the disk '1" comes in contact with a pin, w, which is fitted in the bar It just .beyond the bearing m 'of the shaft-n. The

head j has a tool-stock, a,'att-a'ched to .it and so arranged as. to be adjusted by a screw, b.

The tool 0 is attachedjto the stock a/ by a clamp, d- Through the shaft'u a screw, c,, passes, the use of which will presently be seen.

The operation is as follows The plate A is secured to the driving-wheel B by the clamps O G, the device being so adjusted by means of the adjustable plate D that the crank-pin I will pass through the ring t and be parallel with the rods 8, the screw a being adjusted so that its inner end will fit into the end of the crank-pin I. :The tool a is then adjusted in proper position with the crank-pin at one end of it, and thecrank g is turned, which causes the tool or cutter o to rotate around the crank-pin," the tool 0 being fed along the pin by means of the'screw 13, which is turned at every revolution of the wheel F, in consequence of the star-wheel u coming in contact with the pin 20. Thus it will be seen that by this simple arrangement crank-pins may be turned or made true Wi th the greatest facility,

and without detaching them fromthe drivin ga sliding head, H, having a toolstock, a, attached to it and operated through the medium of the screw 11, star-wheel o, and pin w, all arranged to operate substantially as and for the purpose herein set forth.

S. S. CHENEY. DANFORTH CHENEY.-

Witnesses O. S. FARNHAlVL T. E. Goo TEi 

